WK
Fig. 69 Forcing off the stage casing
5. Dismantle in sequence impellers (230), stage casings
(108) together with diffusers (171.1), keys and stage
sleeve (521) (see Figs. 71 and 72)
Fig. 70 Lifting off the stage casing
Fig. 71 Forcing off the impeller
6. When the last stage casing (108) has been dismantled,
pull shaft (210) together with last impeller (230), spacer
sleeves (525.1) and shaft protection sleeve (524.1) out
of the suction casing (see Fig. 73).
Fig. 72 Slackening and removing the stage casing
7. Pull impeller (230), spacer sleeve (525.1) and shaft
protection sleeve (524.1) off the shaft (see Fig. 74).
Fig. 73 Removing the shaft together with first stage
impeller
8. Stack the stage casings on top of one another in correct
order. The contact faces should be protected by wooden
strips or thick cardboard during stacking, to avoid any
damage. (see Fig. 75)
Fig. 74 Dismantled shaft with impeller spacer sleeve and
shaft protection sleeve.
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